House & Theater District

Blooming from mid summer to early fall, panicle hydrangea gets its name from its large, showy panicles of flowers.  Leaving the dried flowerheads on the plant can add interesting forms and textures to the garden in winter.  Combined with its long bloom time, panicle hydrangea offers nearly year-round interest. Find a variety of cultivars of Hydrangea paniculata as well as other species of Hydrangea in bloom throughout the gardens!  

Viburnum nudum ‘Longwood’ is an essential, multi-season shrub that brings beauty to the garden year-round! A cultivated variety of the native smooth witherod viburnum, this deciduous shrub features glossy green leaves, clusters of creamy white flowers in late spring, and vibrant berries that ripen from pink to deep blue in fall, often showing both colors at once for a striking two-tone effect. In autumn, the foliage turns rich shades of burgundy and purple, adding even more seasonal interest. ‘Longwood’ is prized for its compact, upright habit and excellent berry production, especially when planted near another Viburnum nudum variety for cross-pollination. It thrives in moist, acidic soils and full sun to part shade, and it's a fantastic choice for native plant gardens, pollinator habitats, or low-maintenance landscapes. Plus, it’s a hit with birds and bees alike!  

‘Blue River II’ is a hardy, rose mallow hybrid with large flowers to 10 inches across that blooms from July to September.  These flowers, which attract hummingbirds, are pure white, where as many rose mallow flowers have a deep red center.  'Blue River II' can grow to 5 feet tall and wide and performs best in moist soils and full sun. You may associate hibiscus with tropical plants, but within the parentage of this hybrid rose mallow are species of hibiscus native to the eastern United States.

Dahlias are bold, beautiful bloomers known for their dazzling variety of colors, shapes, and sizes, ranging from petite pom-poms to giant dinner-plate-sized flowers! Native to the highlands of Mexico and Central America, dahlias thrive in full sun and well-drained soil, blooming from mid-summer until frost. With over 40 species and thousands of cultivars, there's a dahlia for nearly every garden style. They're not just garden showstoppers, they also hold cultural significance. The dahlia is the national flower of Mexico, celebrated for its vibrant beauty and indigenous roots. Although they grow as perennials in warm climates (zones 8–10), gardeners in cooler regions often dig up and store the tubers over winter. With a little care, dahlias reward growers with months of spectacular blooms.  Find a variety of Dahlias on display along the Flower Garden Walk and the Idea Garden.  

American spikenard is a large, aromatic woodland perennial native to eastern North America. Growing up to six feet tall, it features bold compound leaves, arching stems, and clusters of small green-white flowers that mature into dark purple berries. A valuable native species, it supports pollinators and provides late-season food for birds and wildlife. Traditionally used by Indigenous peoples and early herbalists, its fragrant roots were valued for treating respiratory issues and fatigue, and even flavored early root beers. Sometimes called “life-of-man,” Aralia racemosa is now appreciated not only for its medicinal past but also for its role in restoring woodland ecosystems.

Commonly known as turtlehead for its unique, snapdragon-like blooms, it is a hardy perennial native to eastern North America. Found along streambanks and moist woodlands, it features upright stems with dark green, serrated leaves and dense spikes of tubular flowers in shades of pink, white, or purple from late summer into fall. The distinctive flowers resemble the head of a turtle, hence the name and are particularly attractive to native bees and butterflies, including the Baltimore checkerspot, which uses Chelone as a host plant. It thrives in moist, rich soil and partial shade, Chelone is ideal for rain gardens, woodland edges, or any spot needing late-season color and environmental benefits. Despite its striking form and low maintenance needs, it remains underused in many landscapes.